Linux on ARM
For those that were interested by the CompuLab Trim-Slice, a desktop built around the ARM-based NVIDIA Tegra 2 platform, here are some more benchmarks. This time the numbers are looking at the performance of the dual-core ARM Cortex A9 system when using the Ubuntu 11.04, 11.10, and 12.04 packages.
Raspberry Pi has just announced the release of a fork a linux kernel 3.1.9. The source code with patches is available at https://github.com/raspberrypi/linux. If you just want to download the patch, I’ve created one: r-pi_linux_3.1.9.patch.gz
Linux 3.3 can change the size of ext4 filesystems faster and supports ACPI 5.0, LPAE for ARM processors, Ethernet teaming and hot replace for software RAID. Meanwhile, Linux 3.1 has reached the end of the line, and the Linux Ate My RAM web site explains why Linux often appears to use all of the RAM.
There is some exciting news to break today on Phoronix... Coming up at FOSDEM (the Free Open-Source Developers' European Meeting in Brussels) will be the formal announcement of an open-source, reverse-engineered graphics driver for the ARM Mali graphics processor. OpenGL ES triangles are in action on open-source code. Will this be the start of fully open-source ARM graphics drivers for Android and Linux?
Linaro is excited to announce that we will once again be having our Demo Friday at Linaro Connect Q1.12 to show the latest Linux developments on ARM.Linaro members, partners and community offer interactive demonstrations showcasing ARM-processor-based boards and Linaro builds of Android and Ubuntu.
Modern computers aren’t just a lot faster than the PCs you probably used ten or fifteen years ago — they also use a lot less power. But most computers designed to run desktop operating systems still use enough energy that they can’t, say, run directly off the power generated by a small solar panel.
Much to my fiancée's dismay my little Genesi Smartbook has been occupying much of my time of the late. In fact, just six days ago I posted about how to get an early build of a Bodhi ARM file system for the Smartbook.
Here it is, the promised DoudouLinux for Genesi Efika SmartBooks! It's a 4GB SD card image, ready to boot a DoudouLinux system built on top of Debian ARM™ Squeeze (armel flavour). This is a multi-language version of DoudouLinux (US English/French):
libavg is a high-level development platform for media-centric applications using Python as scripting language and written in C++ and I've already written a post to cross-compile libavg 1.6 in Ubuntu (with linaro cross toolchain) and using Beagleboard qemu image.
Summary: A new draft of Microsoft's Windows 8 hardware certification specs confirms what we already knew: the new Secure Boot feature won't lock out Linux on hundreds of millions of new PCs. But Linux backers are demanding the right to hack a new class of devices that doesn't yet exist.
Microsoft is planning to require ARM-based devices carrying the Windows 8 logo use Secure Boot, making it difficult or impossible to install Linux or other operating systems.
With Windows 8 coming out later this year, there has already been controversy about whether computers that ship with Windows 8 will have the ability to run Linux, either as a replacement for Windows or in a dual-boot setup.
Microsoft's Secure Boot feature will be mandatory on ARM-based Windows 8 tablets, according to a discovery in Windows hardware certification documents just found this weekend. While it will be optional on x86, disabling Secure Boot "must not be possible" on ARM. As described, it would prevent any unsigned operating system from running on the resulting hardware, including Linux and variants on it, like Android.
I had previously installed Sourcery G++ ARM Linux toolchain in Ubuntu to build some software running in Debian, but I encountered some issues with some libraries (libavg) that use gethostbyname in static libraries without any easy way to make it dynamic.